container.training/slides/kube/declarative.md

Declarative vs imperative in Kubernetes

• Virtually everything we create in Kubernetes is created from a spec

• Watch for the spec fields in the YAML files later!

• The spec describes how we want the thing to be

• Kubernetes will reconcile the current state with the spec
  (technically, this is done by a number of controllers)

• When we want to change some resource, we update the spec

• Kubernetes will then converge that resource